Gage device for lathes.



PATENTED NOV. 14, 1905.

APPLIGATION FILED JAN. 3. 1905.

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N0. 804,793. I PATENTED NOV. 14, 1905. N. D. OHARD & W. LODGE.

GAGE DEVICE FOR LATHES.

APPLICATION FILED JAN. 3, 1905.

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\J A) Q 18 i gi O 4:: Z a wawbo'zp UNITED STATES PATENT OFFICE.

NICHOLAS D. CHARD AND WILLIAM OF CINCINNATI, OHIO, AS-

SIGNORS TO THE LODGE & SHIPLEY MACHINE TOOL COMPANY, OF CINCINNATI,OHIO, A CORPORATION.

GAGE DEVICE FOR LATHES.

Specification of Letters Patent.

Patented Nov. 14, 1905.

To all whom it may concern:

Be it known that we, NICHOLAS D. OHARD and WILLIAM LODGE, citizens ofthe United States, residing at Cincinnati, in the county of Hamilton andState of Ohio, have invented certain new and useful Improvements in GageDevices for Lathes, of which the following is a specification.

Our invention relates to gage devices for the work-tool of anenginelathe.

One of the objects of the invention is to provide means for accuratelysetting or alining the tool relative to the tool-post, so that the toolmay be fed into the work with precision at a predetermined point, thecutting edge of the tool being presented correctly.

Another object of the invention is to provide means for positivelylimiting the inward travel of the tool-post when it has reached apredetermined diameter relative to the work clamped between thespindles.

The features of the invention are more fully set forth in thedescription of the accompanying drawings, forming a part of thisspecification, in which Figure 1 is a top plan view of a lathe-bed,tail-stock, and carriage with our improve ment in position. Fig. 2 is anenlarged plan view of the'diameter-gage. Fig. 3 is a section on line 9090, Fig. 2. Fig. 4 is an enlarged side elevation of tool-post, partly insection, upper portion of tail-stock with diametergage in position ofcentering. Fig. 5 is a side elevation of stop mechanism mounted on thetool compound rest. Fig. 6 is an enlarged front elevation of the stopshown in Fig. 5. Fig. 7 is a section on line w w, Fig. 5. Fig. 8 is afront elevation of one of the journalbrackets of the stop mechanismshown in section Fig. 7.

1 represents a longitudinal bedway. 2 represents the carriage thereon. 3represents the tail-stock thereon.

4 represents the spindle or dead-center of the tail-stock.

5 represents the cross-rail of the carriage.

6 represents the base of an ordinary compound rest engaging thecross-rail 5, and 7 represents the tool-holder, having the base 7 whichhas a sliding gibway engagement with the upper face of the base 6.

8 represents the tool.

8 represents the hand-wheel for reciprocating the tool -holder 7 uponthe base 6. (See Figs. 1 and 4:.)

The cross-feed-screw mechanism for reciprocating the base on thecross-rail 5 is not shown.

9 represents a collar adjustable rotatively upon the spindle of thetail-stock. It is provided with a radial alining-finger 10 and with aseries of radial diameter-gage pins 11.

12 represents a stud secured to the base 6 under the projecting end ofthe tool 8. The stud 12 is provided with a center point 17. The finger10 is provided with a center line 16. (See Figs. 1 and 3.) The finger 10telescopes in the casing 13, projected from the collar 9, (see Fig. 3,)there being a spring 14 between the finger and casing holding the latternormally retracted. Finger 10 is provided with a handle 15, projectingthrough a slot in the casing 13, for manipulating the extensible finger10.

On the side of the base 7 of the toolholder are brackets 19 19 (see Fig.5,) in which are mounted an adjusting-screw 18, having themanipulating-knurl 2 1 20 represents a stop secured to the base 6 of thecompound rest adapted to cooperate with the projecting end of the screw18 to arrest the travel of the tool-holder upon the base of the compoundrest at a predetermined point.

Bracket 19 is provided with the key 22, sliding within a groove formedlongitudinally in the screw 18 to hold the screw against rotation, sothat it may be longitudinally adjusted by manipulating the knurl 21.

ltlode 0f0peratt0n.'l he carriage is moved over toward the tail-stockand adjusted longitudinally of the bed until the line 16 of finger 10registers exactly with the point 17 of stud 12, when the extensiblefinger 10 is brought into alining position. The collar 9 is then rotatedand the finger 1O manipulated to bring the end of the finger oppositethe tool' The tool is then adjusted in its seat until its cutting edgeis alined with the line 16 of finger 10. As the line 16 also indicatesthe cen ter of the gage-pins 11, it is obvious that by this process thetool is not only alined substantially at right angles relative to thelathe axes, but that it is also alined relative to the gageins, so thatthe transverse position of the e ge of the tool can be properly gaged bythese pins. Next, the pin of the desired gage of work is selected and bythe rotation of collar 9 is presented opposite the cutting edge of thetool. The hand-wheel 8 is then manipulated to feed the tool-holder inuntil the edge of the tool just engages the selected gagepin. At thispoint the knurl 21 is rotated to bring the end of the screw 18 intoengagement with the stop 20. The tool-holder can then be fed backward onthe base 6, the car' riage moved opposite to its point of work, and thetool-holder fed in. Obviously the tool will then enter the work at theproper position, and the feed of the tool-holder will be automaticallystop ed when the work has been reduced to the se ected diameter. It isobvious that this stop mechanism might be placed between a tool-holderand the crossrail of the carriage if a simple rest were used instead ofa compound, it being the function of this rest to stop the traverse ofthe toolholder on the carriage at a predetermined point. v

Having described our invention, we claim 1. In an engine-lathe, the bed,carriage, tail-stock, spindle, and tool-holder trans versely slidable onthe carriage, a rotatablyadjustable collar on the spindle provided witha plurality of different-lengthed gagepins, an adjustable .screw on thetoolholder, and a cooperating stop adapted to be engaged by the end ofthe screw, to stop the traverse of the tool-holder at a selected point,

substantially as described.

2. In an enginelathe, the bed, carriage, tail-stock, spindle, andtool-holder transversely slidable on the carriage, a rotatablyadjustablecollar on the spindle provided with an extensible alining-finger, analiningstud on the tool-holder under the projecting edge of the tool,adapted to cooperate with the alining-finger for setting the edge of thetool, and means for clamping the tool on its holder, substantially asdescribed.

3. In an engine-lathe, the bed, carriage, tail-stock, spindle, andtool-holder transversely slidable on the carriage, a rotatablyadjustablecollar on. the spindle provided with a plurality of different-gagedpins, an adjustable screw on the tool-holder, a cooperating stop adaptedto be engaged by the end of the screw to stop the traverse of thetool-holder at a selected point, an extensible alining-finger alsoprojected from said collar, an alining-stud on the tool-holder under theprojecting end of the tool, adapted to cooperate with the alining-fingerfor setting the edge of the tool relative to the holder, and alsorelative to the gage-pin, and means for clamping the tool in its holder,substantially as described.

In testimony whereof we have hereunto set our hands.

NICHOLAS D. CHARD. WILLIAM LODGE. Witnesses:

OLIVER B. KAISER, LUIsE BECK.

